• Publications
  • Influence
MRI-Based Nonrigid Motion Correction in Simultaneous PET/MRI
TLDR
Tagged MRI motion correction in simultaneous PET/MRI significantly improves lesion detection compared with respiratory gating and no motion correction while reducing radiation dose and provides the rationale for evaluation in simultaneous whole-body PET/ MRI clinical studies. Expand
Quantitative dynamic cardiac 82Rb PET using generalized factor and compartment analyses.
TLDR
Quantitative dynamic (82)Rb PET using generalized factor analysis of dynamic sequences and compartmental modeling yields estimates of parameters of absolute myocardial perfusion and kinetics with errors of <9%. Expand
The ultimate signal‐to‐noise ratio in realistic body models
TLDR
The ultimate signal‐to‐noise ratio (uSNR) and G‐factor (uGF) in a realistic head model from 0.5 to 21 Tesla is computed. Expand
Local specific absorption rate (SAR), global SAR, transmitter power, and excitation accuracy trade‐offs in low flip‐angle parallel transmit pulse design
We propose a constrained optimization approach for designing parallel transmit (pTx) pulses satisfying all regulatory and hardware limits. We study the trade‐offs between excitation accuracy, localExpand
Comparison of simulated parallel transmit body arrays at 3 T using excitation uniformity, global SAR, local SAR, and power efficiency metrics
TLDR
Exitation uniformity, local specific absorption rate (SAR), global SAR, and power metrics are analyzed in the torso at 3 T for radiofrequency (RF)‐shimming and 2‐spoke excitations. Expand
Nonrigid PET motion compensation in the lower abdomen using simultaneous tagged-MRI and PET imaging.
TLDR
This work shows that PET motion correction using motion fields measured with tagged-MRI in simultaneous PET-MRI acquisitions can be made practical for clinical application and that doing so has the potential to remove motion blur in whole-body PET studies of the torso. Expand
Novel Scatter Compensation of List-Mode PET Data Using Spatial and Energy Dependent Corrections
  • B. Guérin, G. Fakhri
  • Computer Science, Medicine
  • IEEE Transactions on Medical Imaging
  • 1 March 2011
TLDR
This work proposes a novel scatter approach that incorporates the energy of individual photons in the scatter correction and reconstruction of list-mode PET data in addition to the spatial information presently used in clinical scanners and shows that the energy information can be used to accurately normalize the scatter sinograms. Expand
Nineteen‐channel receive array and four‐channel transmit array coil for cervical spinal cord imaging at 7T
TLDR
To design and validate a radiofrequency (RF) array coil for cervical spinal cord imaging at 7T, a new approach is proposed that aims to reduce the uncertainty in the experimental setup and improve the quality of results. Expand
Design of parallel transmission pulses for simultaneous multislice with explicit control for peak power and local specific absorption rate
To design parallel transmit (pTx) simultaneous multislice (SMS) spokes pulses with explicit control for peak power and local and global specific absorption rate (SAR).
Prediction of peripheral nerve stimulation thresholds of MRI gradient coils using coupled electromagnetic and neurodynamic simulations
TLDR
This work attempts to develop a tool to inform coil design by predicting the PNS thresholds and activation locations in the human body using electromagnetic field simulations coupled to a neurodynamic model. Expand
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